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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Junghwan Moon Juyeon Lee Junghwan Son Jungjoon Kim Seunghoon Jee Seungchan Kim Bumman Kim |
| Copyright Year | 2011 |
| Description | Author affiliation: Department of Electrical Engineering and Division of Information Technology Convergence Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Gyeongbuk, 790-784, Republic of Korea (Junghwan Moon; Juyeon Lee; Junghwan Son; Jungjoon Kim; Seunghoon Jee; Seungchan Kim; Bumman Kim) |
| Abstract | In the envelope tracking (ET) transmitters, the supply voltage is modulated according to the power levels for high efficiency. Such an operation generates quite different nonlinear characteristic in comparison with the conventional standalone power amplifiers (PAs). The effects of even-order nonlinear terms on ET transmitters are explored for the behavior model and digital predistortion technique. By including the even-order terms, the modeling accuracy of ET PA are significantly improved, especially for memory effect. To demonstrate the improved accuracy for the nonlinear prediction of the ET transmitter, the indirect learning based Enhanced Hammerstein predistorter is employed to compensate the transmitter. For the long term evolution signal with 10-MHz bandwidth and 6.5-dB peak-to-average power ratio, the predistorter including the even-order terms delivers a significantly better linearization result than the predistorter without the even-order terms. |
| Starting Page | 1193 |
| Ending Page | 1196 |
| File Size | 510558 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781612842356 |
| e-ISBN | 9782874870224 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-10-10 |
| Publisher Place | United Kingdom |
| Access Restriction | Subscribed |
| Rights Holder | EUROPEAN MICROWAVE ASSOC |
| Subject Keyword | Transmitters Predictive models Accuracy Modulation Peak to average power ratio Predistortion Gallium nitride power amplifier Behavior modeling digital predistortion envelope tracking memory effect |
| Content Type | Text |
| Resource Type | Article |
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